Mechanically-actuated diaphragm-horn.



M. R. HUTCMSQN. QMECHANICALLY ACTU/MED DAPHRAGNI HORN.

- APPLICATION mg MAY 5'. 1909.

Patented Nov. 116, T915 Nl. R. HUTCHISON. MECHANICALLY ACTUATED DIAPHRAGM HORN.' APPLIGATION FILED MAY 5. 1909.

2 SHEETS- shui 2.--

Patented Nov. 16, 1915.

narran sraras Parana? ontarienm MILLERv annsn HU'rciiisoN, or SUMMIT, new JERSEY, iissieivon To LovnLL- ivicoNNELL MANUFAcrURiNe'coMraNY, A lcorrronariton or DELAWARE.

i -MEQHANECLLYACTATED DIAPHRAGM-HORN.

Application filed May 5, 1909. Serial No. 494,120.

To all whom t may concern p Be it known that l, MILLER REESE HUTCHI- soN, acitizen of theUnited States, and a resident of Summit, in the county of Union and State of'New Jersey, have invented certain new and useful Improvements `in Mechanically Actuated Diaphragm e Horns,

of-which the following'isa specification.

My invention relates to that type of horn disclosed in my prior Patents 923,048, '923,04C9 and v923,122 and relate more particularly to the means for supporting and ff rotating the dri.Ve Shaft' This drive Shaft is preferably the armature shaft of an electric motor and the motor is preferably of a voltage currents.

One'important object of myrinvention is to simplify and improve the means for securing the desired relative adjustment of small cylindrical typel adapted to run on low the diaphragm and diaphragm vibrating mea-ns, and to do this I provide, as an important feature of my invention, a novel construction of. diaphragm case, motor case and connection between the two whereby the desired adjustment may be secured by a rotation of one in respect to the other. Vith the shaft parallel or substantially parallel to the diaphragm, the motor case preferably c has a portion encircling the shaft and pre-` senting an eccentric surface engaging in a bearing rigid with the diaphragm case. The

degree of ecceiitricity is determined by the maximumlimits of desirable adjustment.

A further important Object of my invention is to'provide a simple and rigid support for the motor and the shaft thereof, so that if said motor be of the cylindrical type, the

armature shaft may lie comparatively close to the diaphragm, and a cam or other dia- 'phragm vibrating rotor of an efiicient size may engage with a comparatively low wearpiece. To secure this obj ect, Ih mount the motor properV beyond but adjacent to the peripliery of the diaphragm and provide thev motor 'case' with an extension projecting radially adjacent to the surface of the diaphragm and presenting a bearing for the shaft adjacent to the cam o'r`other rotor and to the center of the diaphragm. Preferably tlie'diaphragm case supports this extension at a point close to said bearing andtlius resists the reactiondue to cam thrusts and' rey turn swings of the diaphragm.

specification of Letters Patent.

rar-@mea new. ic, isis.

importance will appear in connection with a detailed description of a preferred embodivment of my invention and the appended claims, but I do not herein claim any invention residing in the method of operation or in certain features of the construction including the form or design of the rotor. These are set forth and claimed in my divisional application vSerial No. 571,188 filed Juiy 9,1910.

Reference is to be had to the accompanying drawings showing one embodiment of my invention, in whichl similar reference characters indicate corresponding parts in the several views. Y'

' In these drawings: Figure l is a 'vertical central section of the horn and motorassembied, the battery connections being diagrammatically indicated; Fig. 2 is a face view of the device, the resonator case and diaphragmbeing removed and the motor case .being vshown in' vertical section; and

Fig. 3 is a central transverse section at right' angles to the lane of F ig, l.

The genera organization 'of the parts is shown inFigs. l, 2, and 3. The' diaphragm l is clamped at the edges between two sections of an inclosing case. The rear section '2 is formed with rear walls approximately parallel with the diaphragm, except where it is'enlarged, as'at 3 and 4, to form inclosing chambers for the cam, cam-shaft,- and bearings. The front face is-formed with anannular clamping surface 5. -|The front cover or resonator section 6A of the diaphragm case is vparallel with the diaphragm and far enough away from it to permit maximum vibration of the diaphragm'without engage.

vment with the case. Itis formed with the central opening 7 of large 'diameter so as to expose a large part of the eii'ectively vibrat# ing part of the diaphragm.4 The' opening is surrounded by an annular-flange' 8,- which sfo may be flared toward the open end,` as indifaces are of ample width and thickness to apply the clampingpressure of the screws 12 evenly about the periphery of the diaphragm. The quality of the note is improved and destructive vibration and cutting action of the diaphragm is prevented by washers 13 and 14E arranged between the diaphragm and the clamping faces of each sectionof the case, These washers may be wood, or hardened fiber.

The diaphragm 1 is provided with a wear piece `15 formed with a shank 16 riveted over a washer 17.

The section 2 of the diaphragm case is formed with webs 18, 19, having alined openings for support of the cam shaft V20. The latter is mounted in a bearing sleeve 21 with its axis eccentric to but preferably parallel with the axis of said bearing 21, as shown more clearly in Figs. 2 and 3. Vhen of non-vibratory material such as cork,

said bearing is rotated, the axis of the shaft moves in a circular path approximately parallel with the axis of thev sleeve. ln practice,'l find that the radius of this eccentricity need not be much greater than the amplitude of Vibration' of the diaphragm,v

in order to give a throw amply sufficient for all required adjustment of the cam shaft with respect to the diaphagm.

The sleeve bearing 21 is held in a desired position of longitudinal adjustment; by means of a screw collar 22 engaging the end wall of the casing.v This collar is locked in position by means of a screw key 23, screw threaded into collar 22 and having a stud 2a engaging a recess in sleeve 21.

There isa cooperating lock nut 25 outside of the casing which may be loosened to permit rotary adjustment of the sleeve bearing 21 and the cam shaft 20 carried thereby and which may be tightened to rigidly clamp said bearing against both longitudinal and rotary movement. The cam 2G is keyed to the cam shaft 2O by pin 27 and is clamped against shoulder 23 by locknuts 29.

Oil for lubricating the shaft 2O and also the contact between cam 26 and wear piece 15, is supplied through anoil passage or ervoir 30. Part of the oil is thrown by centrifugal force from the rapidly revolving vcam against the projection 15 and part of it finds its way through the opening 31 arranged longitudinally of the shaft 2O and extending down to the bearing point of the latter upon sleeve 21. ln order to avoid too great friction, the interior of sleeve 21 is cut away s o asto be out of contact with the shaft 2O from the point downward.

In the form shown herein, the bearing sleeve 21 is extended outside of the case and is utilized as a support for the motor case 33. As shown more clearly in Fig. 2, this case is concentric with the cam shaft 20, while the bearing sleeve is slightly eccentric thereto, as indicated at 3l, though this eccentricity may be so small as to be prac- Itically unnoticeable. to the eye from the exterior.v The end of the sleeve 21 is formed as an end wall 35 of the motor case and is secured tothe latter by screws 36, 36.

On the cam shaft 20 is mounted the motor armature 37 revolving between polepieces 38, 38, formed as integral projections of the shell or case 33 and energized by y field windings 39, 39. The case 33 is closed in at the bottom by an inclosing wall 4() formedwvith journal L11 for the lower end of shaft 20. Surrounding this is an annular cavity d2, supplying lubricating oil or grease through passages The lubricant is held in position 'by means of a disk etat, engaging the annular shoulder 4:5.

-The current for o eratin the motor is derived from battery 1G controlled by circuit closers, as at 47, and, if desired, regulated by an adjustable resistance B. This circuit is connected to binding posts 3, 13, leading within the case 33 and .insulated therefrom by bushings 49, 19.-. As diagrammatically indicated by dotted lines in Fig. 1, the current is supplied in parallel to the field windings 39, 39 and to the brushes 50, 50 of commutator 51 supplying armature 37. Above the armature 37, upon the armature shaft 20, adjacent the end of sleeve 21, is arranged a collar 52, whereby the drip of excess oil is thrown 'off centrifugally on the sides of the case 33l and so is prevented from saturating the armature and leaking down on-the commutator, thereby impair-ing the contact of the commutator bars therewith.

By reference particularly to Fig. 3, it will be seen that the adjustment of the cam shaft to and from the diaphragm may be accomplished by rotating the eccentric sleeve 21 througha quarter rotation in either direction from the medial positioi hewn in saidl`ig. 3 and that rotation thi yugh a semicircumference from said positie wiil bring the axis of the cam shaft to a pocn wh re it is exactlythe same distance pe oendicularly from the diaphragm, but is on the left hand side of the axis of sleeve tain cases, it is confusing to unskilled users to have an adjustment of this l wherein a continuous rotation in one diiey .Y as an adjustment toward the dia,l L through a half revolution, and the adjustment away from the diaphragm during the` other half revolutionl l may avoid this by arranging the seats (i0, in full lines in Fig. 2 and in dot Fig. 3, adjacent the collar engaged by the head of screw 23, thereby limiting the rotary adjusting `movement to a half revolution, in which all rotary movement in one direction carries the cam shaft toward the diaphragm andall rotary movement in the other direction carries the cam shaft away from the diaphragm.

ln practice, l prefer to make the diafli all G1, shown v 5 to 6 inches in diameter, .02 to .03 inches in thickness, clamped inch about the edge,

in connection with a rotary cam having the proportions shown 1n the drawings and made of 'highly tempered steel. A desirable motor for use on ignition batteries of automodiles is a direct currentshun't wound motor-,adapted to operate on live to seven volts.

The possible reactions and the possible variations of adjustment, spacing, Vand speed of the cam and also of the relative velocities, amplitudes of vibrations, elasticities, and inertias of the diaphragm, as well as the modifying effects ofthe resonator may be many and complex as set forth in my co-v pending application Serial No. 37 3,946, filed May 16th, 1907 (Patent No. 923,049) and in my application Serial No. 571,188, filed` July 9th, 1910, which is for subject matter divided out of this application, nevertheless, it will be found that when a suitable design of cam', diaphragm, wearpiece and motor power has been provided, such, for instance, as shown herein and more fully explained in my said divisional application, the remaining complexities may be taken care of by adjustment of the cam to and from the diaphragm. In practice, the locknut 25 is loosened and the current is turned on. With the motor case as a handle, the sleeve '21 is rotated and-the cam is thereby adjusted to and from the diaphragm until the proper operation is made evident by the great increase in volume'and improvement in quality of the tone.' The locknut is then tightened and the device may be continued in use indefinitely.

While I have herein fully shown and described, and have pointed out in the appended claimsv certain novel features of construction, arrangement, and operation which characterize my invention, it will be understood by those skilled in the art that various omissions, substitutions, and changes in the forms, proportions, sizes, and details of the device and `of its operation, may be made without departing from the spirit of my invention. Y I claim:

1. In an alarm or signaling apparatus, a diaphragm and a rotary vibrator therefor, in combination with a drive shaft for the latter and a bearing for said shaft, said bear. ing being provided with an external bearing surface, having an axis eccentric to the axis of said shaft, whereby rotation of said bearing on its bearing surface operates to adjust said shaft of said vibrator nearer to or farther from said diaphragm, together with a locking nut screw threaded over said shaft bearing for holding the same in a. desired position ofadjustment. i

2. In an alarm or signaling apparatus,- a

horn or resonator and a diaphragm therefor, .a rotary cam, a case for said diaphragm, in combination with a drive shaft 'for the latter anda bearing for said shaft,'said bearing being provided with .an external bearing surface, having an axis eccentric to the axis of said shaft, whereby rotation of said rotary bearing'on its bearing surface operates to adjust said shaft of said vibrator nearer to or farther fromsaid diaphragm,

together with a locking nut screw threaded over said shaft bearing for holding the same ina desired position of adjustment.

3. In an alarm or signaling apparatus of the class described, a diaphragm, rotary mechanical meansfor vibrating said ,diaphragm, and ,a dust tight case forthe rear of said diaphragm inclosing said vibrating means, in combination with an' electric'motor, a dust tight case inclosing said motor, provided with an extension or sleeve secured-to and having a dust tight joint with said diaphragm case, said projection or sleeve having an exterior bearing surface eccentric to the axis of said motor.

4. In an' alarm or signaling apparatus of the class described, a diaphragm, rotary mechanical means for vibrating said diaphragni, and a dust tight case for thV rear of said diaphragm inclosing saidv vibrating means, in combination with an electric motor, a dust tight case therefor provided with an extension or sleeveprojecting into vand having a dust tight joint vwith said diaphragm case, and said extension or sleeve having an exterior bearing surface eccentric to the axis of said motor, and means foilocking said sleeve in a desired position of rotary adjustment.

5. An alarm-orsignaling device of the' class described, comprising a diaphragm and a power shaft for vibrating said diaphragm, a sleeve in which said shaft is mounted having an exterior bearing surface eccentric to the vaxis of said shaft, said,

sleeve being mounted in bearings concentric with its own axis, and means for locking said sleeve in any desired position ofrota'ry adjustment.

. G. Inan alarm or signaling device of the class described, an electric motor having an armature shaft and a dust tight case provided with an extension or sleeve for the armature shaft, said extension being formed drical bearings foi-,said eccentric bearing surface of the sleeve of the armature shaft.

7. In'an alarm or signaling device of the class described, an electric motor having an armature shaft and a dust tight case provided with an extension or sleeve for the armature shaft, said extension being formed with an exterior cylindrical bearing surface eccentric to said shaft, 1n combination with a vibratory diaphragm, means for vibrating t it and a dust tight case for the rear of said diaphragm, said case being formed with `a cylindrical bearing for said eccentric bearing surface of the sleeve of the armature shaft, together withi a fixed collar and a cooperating nut on said sleeve adapted to clamp the wall ofthe case about the opening for the sleeve of said motor shaft.

8. In an alarm or signaling device of the class described, a diaphragm, a vibrator for said diaphragm, a casing for said vibrator, a shaft on Which said vibrator is mounted, driving means for said shaft, a casing for said driving means, an extension formed thereon, through which said shaft extends,

means for pivotally securing said extension vto said vibrator casing, and for varying the position of the shaft and the vibrator relatively to the diaphragm by turning the driving means casing about the axis of said extension, relatively to the vibrator casing and means for limiting the arc of the turn- `ing movement so that all turning movement in one direction moves the vibrator toward said diaphragm and all turning movement in the other direction moves the vibrator away, from said diaphragm.

j 9. In an alarm' or signaling device of the class described a diaphragm, a vibrator therefor, aecasing for said vibrator, a shaft on which said vibrator i's mounted, driving means for said shaft, a support for said shaft provided with .an eccentric bore through which said shaft extends, means for pivotally securing said support to said vibrator casing, whereby rotary motion of said support about its own axis varies the relative positions of said vibrator and said diaphragm, and means for limiting relative rotary motion between Said casings,

whereby the rotary motion in one direction moves the vibrator toward, and ro-V tary motion in the other direction moves the vibrator away from said diaphragm-i l0. In an yalarm or signaling apparatus, a horn or resonator and a diaphragm therefor,in combination with a rotary cam, a

driving shaft, a case in the rear of said diaphragm inclosing said 'rotary cam and shaft, and an eccentrically pivoted bearing for said cam shaft, a-portion of said bear.- ing being disposed within a circular opening in the wall of said case.

ll. In an alarm or signaling apparatus,-

av diaphragm, a .casing on the rear of said diaphragm, a shaft projecting into said casing, a cam mounted on said shaft for lvibrating said diaphragm, driving means for said shaft, a casing therefor and means for rotatably securing the casing of said driving means to said diaphragm casing and for'varying the position of said cam relative to said diaphragm, by rotating one casing relatively to the other.` e

'12. In an alarm or signaling apparatus, a diaphragm, a casing for the rear of said diaphragm, a vibrator for said diaphragm located in said casing, a shaft for actuatingr said vibrator, a motor for driving said shaft, a casing for said motor, a cylindrical extension on said motor casing, provided with an eccentrically located bearing for said shaft and vmeans for rotatably securing said extension to said diaphragm casing whereby the position of said vibrator may be adjusted relatively to said diaphragm by turning said motor casing about the axis of said extension.

13. In an alarm or signaling apparatus, a diaphragm, a casing for the reai of said diaphragm and having an opening therein, a. vibrator for said diaphragm located within said casing, a drivingrshaft for lsaid vibrator, driving means for said shaft, a bearing member for said shaft, and means for rotatably securing said member in the opening'of said diaphragm casing about an axis eccentric to the axis of the shaft whereby the position of the vibrator may be adjusted relatively tothe diaphragm by rotating said member about its own axis.

rotation of said motor case about the axisof said cylindrical portion.

l5. In an alarm or signaling apparatus,

a diaphragm, a case for the rear of said diaphragm and having a circular aperture therethrough, a motor including a case having a cylindrical portion projecting into said aperture and constituting a bearing for the armature shaft of said motor, a vibrator for the diaphragm located in the diaphragm case and carried by said armature shaft, and means having threaded engagement with said motor case for normally preventing relative movement of said motor case and said diaphragm case. v

16.' In an alarm or signaling apparatus,

y i Y provided with a bearing for the motor shaft,

Y ce' endvvise movement out of said aperture, and

.a arollar having threaded engagement with said cylindricalportion and abutting against 10,`

to said diaphragm case. j

' 17. In ahorn, an electric motor having van VAa removable cap across'the open end and y va casing member having anpopening Within which said shell is rotatably mounted, a

)diaphragm having its marginal edges semotor shaft for vibrating 4the diaphragm' phra'gm clamped to said member, a. rotary `electric motorhavinga diaphragm vibrator and-acylindri'cal casing portion .rotatably mounted insaidopening'to permit the bod- ,ilyf adjlistnient of the vmotor-andv vibrator toward 'and -from theplane of the; diaphragm, and a lock nut threaded-upon lsaid cylindrical casing portion vand adapte'd to vabut against said casing member, to normallyv pr'event bodily `rotation of the motor. l l19. A horn or signaling device having a diaphragm, a casing" member presenting an ture shaft for vibrating said diaphragm; a rotary electric motor, said moto'r having-a shell presenting a cylindrical portion disposed Within said opening and. rotatable to alrsecure adjustment o f said motor toward and 20. Ina horn, an'A electric motor having al1,-

, Vinclo'sing shell havinganend Wall .provided `With a bearing'for the dmotorshaft, a cas- ,l

diaphragm, arrear casing member support-v ing'member having an opening Within which said shell is rotatably mounted, a diaphragm' v having its marginal edges secured Vto said f member, a wheel on the motor shaft having j projections and `a po'vverl transmitting memer intermediate said Wheel and diaphragm,

said projections operating'against said member to.l vibrate said diaphragm'.-

.112655 -ZLlrra Il1 orn,.a n electric motorhaving an said diaphragm case lfor normally prevent. ing bodily rotation of said motor in respect.

Vinclosing shell provided 'With an open end,4

cured-to said `member, and means on ,the

fof, and provided externally with bearing `portions 'adjacent the motor, and adjacent .the upper end for engagement With said casing atspaced points, and means for secur- -100 opening and arotor carried by the arma-v inclosing shell provided with a cylindrical portion at one end, an end 'Wall at the opposite end of the shell and provided with a bearing for the motor shaft, an apertured diaphragm casing member receiving said cylindrical portion, a diaphragm having its marginal edges secured to said member, a. projection on the intermediate portion of the diaphragm, a toothed wheel on the motor shaft operating against the projection to vibrate the diaphragm, said motor shaft and said toothed'ivheel being adjustable toward and from the diaphragm by a bodily rota' tion of Said motor- Within said casing.

22. A device of 'the class described, comprising a diaphragm, a rotor for vibrating said diaphragm, and a rear casing inclosing said rotor and forming With'said diaphragm -a closed chamber, in combination with means vfor supporting and rotating said rotor with its axis vin approximate parallelism With the diaphragm,"comprising a rotary electric motor, having an encirclingy iron shell form- ',ing'part of the magnetic circuit of the field,

a closure for the lower endof said shell,

,including a'step-bearing for the arma-ture armature shaft adjacent the upper end thereing `said extension rigidly to said casing 'at one of said points'. V

`23.A deviceof the class .described ,co'm-v prising a diaphragm, a rotor, arear casing inclosing said rotorand supporting said diaphragm and means for supporting and rotating said rotor With its axisin approximate parallelism with the diaphragmcom prising a rotary electric motor having an encircling shell beyond but adjacent to the periphery of the diaphragm, a step-bearing `for'the armature shaft, an axial extension formed linternally 'with a bearingfor the armature Shaft adjacent Ithe' .upper end thereof, and provided externally Withbearing portions adjacent the motor, and adjacentthelupper end for-'engagement With said casing at spaced points, and means for securing said` extension rigidly to said casing-at, one offsaid points'.

24. An alarm or signaling device 'compris- 126 ing a'diaphragm, a rotor for vibrating said said shell having an A.extension projecting radially ofthe diaphragm and including a bearing for the armature shaftradjacent'to rotor, and means Ifor-rigidly connecting;13"`

said extension to said rear easing member.

25. An alarm or signaling device comprising a diaphragm, a rotor for vibrating said diaphragm, a rear casing memberV sup,-V Yporting said diaphragm, 'a rotary electric motor having a cylindrical shell disposed heyond but adjacent to the periphery of the diaphragm with its axis parallel to the latter, said shell having an extension projecting radially of the diaphragm and inelding a bearing for the armature shaft admedew jacent to Said rotor, and means for rigidlyeonneeting saidextension to said rear easing member at a point adjacent to said hearing and at a point adjacent to the periphery of the diaphragm. l

Signed at New York city, in the county of New York and State of New York, this Vlt-h day of May, A. D. 1909. f

MILLER REESE HUTCHSON.

Witnesses GEORGE C. DEAN, IRVING M. OBRIEGHT. 

